Fix continuation_indent_size in .editorconfig

The new spring-javaformat changed this so .editorconfig should follow.

Closes gh-3684

Author: jonatan-ivanov

.editorconfig

@@ -6,7 +6,7 @@ insert_final_newline = true
 [*.java]
 indent_style = space
 indent_size = 4
-continuation_indent_size = 8
+continuation_indent_size = 4
 ij_java_imports_layout = *,|,javax.**,java.**,|,$*
 ij_java_class_count_to_use_import_on_demand = 5
 ij_java_names_count_to_use_import_on_demand = 3